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[188.152.100.94]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-486f8b1fe65sm77289195e9.5.2026.03.19.11.41.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Mar 2026 11:41:50 -0700 (PDT) From: Stefano Radaelli X-Google-Original-From: Stefano Radaelli To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: pierluigi.p@variscite.com, Stefano Radaelli , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley Subject: [PATCH v4 01/11] arm64: dts: freescale: imx8mm-var-som: Move UART4 description to Symphony Date: Thu, 19 Mar 2026 19:40:21 +0100 Message-ID: X-Mailer: git-send-email 2.47.3 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Stefano Radaelli The VAR-SOM-MX8MM module does not provide an onboard debug console. UART4 is routed and exposed only on the Symphony carrier board, while custom carrier designs may choose to expose a different UART. Move the UART4 node from the SOM device tree to the imx8mm-var-som-symphony.dts, keeping the SOM dtsi limited to hardware present on the module itself. Signed-off-by: Stefano Radaelli --- v3->v4: -=20 v2->v3: -=20 v1->v2: -=20 .../dts/freescale/imx8mm-var-som-symphony.dts | 18 ++++++++++++++++++ .../boot/dts/freescale/imx8mm-var-som.dtsi | 18 ------------------ 2 files changed, 18 insertions(+), 18 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/ar= ch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts index affbc67c2ef6..819707e6f3bf 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts +++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts @@ -11,6 +11,10 @@ / { model =3D "Variscite VAR-SOM-MX8MM Symphony evaluation board"; compatible =3D "variscite,var-som-mx8mm-symphony", "variscite,var-som-mx8= mm", "fsl,imx8mm"; =20 + chosen { + stdout-path =3D &uart4; + }; + reg_usdhc2_vmmc: regulator-usdhc2-vmmc { compatible =3D "regulator-fixed"; pinctrl-names =3D "default"; @@ -156,6 +160,13 @@ &uart3 { status =3D "okay"; }; =20 +/* Console */ +&uart4 { + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_uart4>; + status =3D "okay"; +}; + &usbotg1 { disable-over-current; extcon =3D <&extcon_usbotg1>, <&extcon_usbotg1>; @@ -251,4 +262,11 @@ MX8MM_IOMUXC_UART3_RXD_UART3_DCE_RX 0x140 MX8MM_IOMUXC_UART3_TXD_UART3_DCE_TX 0x140 >; }; + + pinctrl_uart4: uart4grp { + fsl,pins =3D < + MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140 + MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140 + >; + }; }; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64= /boot/dts/freescale/imx8mm-var-som.dtsi index 190bde4edcd7..b6560c03639e 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi @@ -9,10 +9,6 @@ / { model =3D "Variscite VAR-SOM-MX8MM module"; =20 - chosen { - stdout-path =3D &uart4; - }; - memory@40000000 { device_type =3D "memory"; reg =3D <0x0 0x40000000 0 0x80000000>; @@ -274,13 +270,6 @@ &uart2 { status =3D "okay"; }; =20 -/* Console */ -&uart4 { - pinctrl-names =3D "default"; - pinctrl-0 =3D <&pinctrl_uart4>; - status =3D "okay"; -}; - &usbotg1 { dr_mode =3D "otg"; usb-role-switch; @@ -418,13 +407,6 @@ MX8MM_IOMUXC_SAI3_RXD_UART2_DCE_RTS_B 0x140 >; }; =20 - pinctrl_uart4: uart4grp { - fsl,pins =3D < - MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140 - MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140 - >; - }; - pinctrl_usdhc1: usdhc1grp { fsl,pins =3D < MX8MM_IOMUXC_SD1_CLK_USDHC1_CLK 0x190 --=20 2.47.3